SIANA ELECTRIC Ltd. (Bulgary)
"KRONOS-1" Ltd. (Bulgary)
National Electricity Company (Bulgary)
Statnett SF (Norway)
Eltel Networks Corporation (Finland)
FINGRID OYJ (Finland)
IVO Power Engineering Ltd. (Finland)
Nordisk Elektra AB (Finland)
SICAMEX (France)
Zanjan Regional Electric Company (Iran)
Iran Power Development Co. (Iran)